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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-521

Greber, U F; Webster, P; Weber, J; Helenius, A (1996). The role of the adenovirus protease on virus entry into cells. The EMBO Journal, 15(8):1766-1777.



Adenovirus uncoating is a stepwise process which culminates in the release of the viral DNA into the nucleus through the nuclear pore complexes and dissociation of the capsid. Using quantitative biochemical, immunochemical and morphological methods, we demonstrate that inhibitors of the cystine protease, L3/p23, located inside the capsid block the degradation of the capsid-stabilizing protein VI, and prevent virus uncoating at the nuclear membrane. There was no effect on virus internalization, fiber shedding and virus binding to the nuclear envelope. The viral enzyme (dormant in the extracellular virus) was activated by two separate signals, neither of which was sufficient alone; virus interaction with the integrin receptor (inhibited with RGD peptides) and re-entry of the virus particle into a reducing environment in the endosome or the cytosol. Incorrectly assembled mutant viruses that lack the functional protease (ts1) failed at releasing fibers and penetrating into the cytosol. The results indicated that L3/p23 is needed not only to assemble an entry-competent virus but also to disassemble the incoming virus.


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Item Type:Journal Article, refereed
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Date:15 April 1996
Deposited On:11 Feb 2008 12:15
Last Modified:20 Dec 2013 20:25
Publisher:European Molecular Biology Organization ; Nature Publishing Group
Related URLs:http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=8617221
PubMed ID:8617221

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